Revert of [heap] Start sweeper tasks after evacuation.

src/heap/spaces.h

Index: src/heap/spaces.h
diff --git a/src/heap/spaces.h b/src/heap/spaces.h
index a66f3394d3117585a1fd8af755b4cc54448464bb..5d22e4bc58ed80fcd4dedd45d60878cec9fd0aa8 100644
--- a/src/heap/spaces.h
+++ b/src/heap/spaces.h
@@ -413,10 +413,6 @@
     return concurrent_sweeping_;
   }
 
-  bool SweepingDone() {
-    return concurrent_sweeping_state().Value() == kSweepingDone;
-  }
-
   // Manage live byte count, i.e., count of bytes in black objects.
   inline void ResetLiveBytes();
   inline void IncrementLiveBytes(int by);
@@ -769,6 +765,10 @@
     mutex_->Lock();
     mutex_->Unlock();
     DCHECK(SweepingDone());
+  }
+
+  bool SweepingDone() {
+    return concurrent_sweeping_state().Value() == kSweepingDone;
   }
 
   void ResetFreeListStatistics();